Abstract
The calculation results of Kerr rotation angle (θk) and reflectivity (R) for Magneto-Optical (MO) disks are described. When the memory layer is TbFeCo, θk is 1.4 degree, R is 12ɛ and figure of merit (□R·θk) is 0.50. In the same structure disk, we measured carrier to noise ratio (C/N). C/N is more than 50dB, θk is more than 1 degree and R is 12ɛ. When Pt/Co multilayer is used, θk is 1.38 degree, R is 27ɛ and □R·Rθk is 0.72. These calculations show that Pt/Co multilayer has excelent characteristics for MO disk.
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